Figure 2
From: Feasibility of backscatter RFID systems on the human body
On-body antennas. On-body monopole and patch antennas resonant at 900 MHz (left) and 2.45 GHz (right): The antennas were designed by means of a human body model and realized on FR-4 substrate with a thickness of 1.6 mm. The designs were optimized for an antenna-to-body separation distance of 5 mm. Details about the antenna properties can be found in [20] (reprinted from [20], Ⓒ2012 IEEE).